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Valentino Rossi has a lot of power at Yamaha according to James Toseland (Image: GETTY)

“There must have been some serious mistakes within the factory in Japan to allow one of their head developers to hold his hands up and apologise.

“I can’t remember any manufacturer ever doing that.

“I’m not sure if it was the right decision.

“If there were big mistakes made in Japan at Yamaha it’s very humble for them to hold their hands up and admit it in public.”

MotoGP has tightened up its rules in recent years in a bid to keep the sport competitive.

Valentino Rossi received a public apology from Kouji Tsuya (Image: GETTY)

Toseland says errors in the development stage can cost teams dearly.

He said: “With the rules in MotoGP, because the seven engines are sealed, you cannot have any upgrades basically throughout the year.

“If they make a bad call at the start of the year, then that’s it.

“It is the nature of how the rules are in MotoGP.

“If you make one bad move in the winter on the development of a new bike, it can really hinder the whole year.

“It puts the manufactures under a lot of pressure. It’s much tougher than it used to be.”

* Watch every moment of the MotoGP season exclusively live on BT Sport 2, with three full days of action every race weekend. Watch the San Marino and Rimmini Coast Grand Prix on Sunday September 9 from 1pm on BT Sport 2. For more info visit www.bt.com/sport